tomcat 4.1

hey folks ..i'm in real trouble in using tomcat 4.1 . Here i want to create a user directory under webapps for wrting all my servlet program. so i created one dorectory under webapps folder with appropriate structure . But when i try to pass some parameters from one html file to another servlet file , i'm getting that dreaded 404 error. can anyone tell me what should i write in my form action field and in html file and what to write in browser so that if i pass some parameter in that html file i will be able to get the processed result from the servlet file. for example i want to pass a name from the html file and say "helloo mr name ." in the servlet file. here i'm not able to pass from html to servlet , its saying 404 error. i have both the correct html and servlet file with me...Thank u